#include<bits/stdc++.h>

using namespace std;
int a[]= {1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,4,1,2,3,1,2,3,4};
int main() {
	int sum=0;
	char n[210];
	gets(n);
	for(int i=0; i<strlen(n); i++) {
		if(n[i]>='a'&&a[i]<='z') sum=sum+a[n[i]-'a'];
		if(a[i]==' ') sum++;
	}
	cout<<sum;
	return 0;
}